These scams can come in a variety of forms, but in this case, when the responder provides his/her address, the scammer sends a check for a large sum of money. The scammer is hoping you will deposit it, wire them a portion of the money (per whatever "agreement" was arranged), and leave you with a bounced check for which the bank expects you to pay the difference.

One way or another, the scammer is seeking to steal money from you. If you receive or have already received an email like this, DELETE it immediately. More information about this "Mystery Shopper" scam can also be found on the Federal Trade Commission's Web site.

Here's an example of this scam:

Similarly, scams for "job postings" seek to steal money or information from you. Approach such emails with caution, especially if you don't recognize the source and can't verify it, or if you notice any of the hallmarks of a scam email (bad grammar, typos, bad formatting, lack of information, etc.). If you are looking for a job, go directly to the organization's or job service's Web site to browse for postings.